Evaluation of foliar fungicide treatments on winter wheat in Sandusky, Michigan, 2008.

摘要

Field research was conducted at the Stoutenburg Farms in Sandusky, Michigan on a Parkhill silt loam to evaluate the efficacy of biologically-based fungicides alone and in combination with conventional fungicides.Hopewell soft red winter wheat was planted on 8 Oct 07 at a rate of 1.8 m seeds per acre into minimum tilled ground previously cropped to dry beans. A completely randomized block design was used. Plots were 10 ft wide by 50 ft long, and treatments were replicated four times. Individual fungicide treatments were applied on 22 May 08 at flagleaf emergence (Feekes growth stage 8-9) and 9 Jun 08 at early flowering (Feekes growth stage 10.5.1). All treatments included a nonionic surfactant (0.125 % V/V) and were applied using a hand-held CO2 plot sprayer using four Twinjet nozzles (TJ60-8002),a 15 GPA rate of water, and an application pressure of 35 psi. The center five ftof each plot was harvested on 18 Jul 08 using a small plot combine. Treatment means were calculated and separated using Fisher’s protected least significant difference (LSD) with p=0.05.